|Publication number||US4504397 A|
|Application number||US 06/430,632|
|Publication date||Mar 12, 1985|
|Filing date||Sep 30, 1982|
|Priority date||Sep 30, 1982|
|Publication number||06430632, 430632, US 4504397 A, US 4504397A, US-A-4504397, US4504397 A, US4504397A|
|Inventors||William E. Matthews|
|Original Assignee||Phillips Petroleum Company|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (2), Referenced by (7), Classifications (9), Legal Events (5)|
|External Links: USPTO, USPTO Assignment, Espacenet|
This invention relates to method and apparatus for removing sedimentary constituents from liquids.
In many processes, it is desirable to be able to analyze a liquid which contains a high concentration of sedimentary constituents. An example of this is water used in a refinery. If the water is too hard, deposits will form in boilers and heat exchangers which is highly undesirable. Thus, it is desirable to be able to analyze the water to determine its hardness so that an appropriate treatment of the water to reduce hardness can be applied if needed. However, the water may contain such a high level of sedimentary constituents that it is not possible to analyze the water for hardness.
It is thus an object of this invention to provide method and apparatus for removing sedimentary constituents from a liquid so that the liquid can be analyzed.
In accordance with the present invention, method and apparatus is provided for settling the sedimentary constituents out of the liquid prior to pumping the liquid through a filter to an analyzer. The settling procedure substantially reduces the changing of a filter due to clogging of the filter and a liquid, substantially free of sediment, is provided to an analyzer.
Other objects and advantages of the invention will be apparent from the foregoing brief description of the invention and the claims as well as the detailed description of the drawing which is briefly described as follows:
FIG. 1 is a diagrammatic illustration of the sedimentary constituent removal system of the present invention for alternately analyzing two liquid streams.
The invention will be described in terms of an analysis of water to determine the hardness of the water. However, sedimentary constituents can be removed from any suitable liquid in accordance with the present invention to prepare the liquid for analysis.
The invention is also illustrated and described in terms of the alternate analysis of two streams of water coming from separate processes. However, the invention is applicable to the analysis of only one water stream or more than two water streams alternately.
Referring now to FIG. 1, water is withdrawn from process 1 through conduit means 11, in which control valve 12 is operably located, and is gravity fed to a sample pot 14. Overflow from the sample pot 14 is collected in the overflow pot 16 and is removed through the combination of conduit means 17, 18 and 19 to a drain.
After a desired sample has been collected in the sample pot 14, control valve 12 is closed and the sample is allowed to set while the sedimentary constituents settle out. Preferably, the water in the sample pot 14 is allowed to set for a time in the range of about 3 to about 5 minutes. Generally, about 95% of all sedimentary constituents will settle out during this time period.
The top of the sample pot 14 is preferably open while a hinged top 15 is preferably placed on the overflow pot 16. The top of the sample pot 14 could be closed if desired but it is preferred to use an open air design since the open air design readily allows visual observation of the interior surfaces of the sample pot 14 and facilitates manual cleaning and flushing of the sample pot 14. Also, the overflow pot 16 could be left open if desired, but rainwater could affect the analysis. Thus, a hinged top is preferred to prevent rainwater and other foreign materials from affecting the analysis while still providing easy access to the sample pot 14.
After a suitable settling time has passed, the control valve 21, which is operably located at the junction of conduit means 23, 24 and 25, is switched to a position such that fluid may flow through conduit means 23 to conduit means 25 (sample position as opposed to drain position ). The water in the sample pot 14 is then pumped by means of pump 27 through a screened, conical particle filter 28 which is positioned above the sediment level. The thus removed water is provided through the combination of conduit means 23, 25 and 29 to the suction inlet of the pump 27.
When it is desired to provide a sample to the analyzer 31, control valve 32, which is operably located at the junction of conduit means 34, 35 and 36, is set to a position such that fluid may flow from conduit means 34 to conduit means 35 (sample position as opposed to drain position). In like manner, control valve 38, which is operably located at the junction of conduit means 41, 42 and 43, is set such that fluid flows from conduit means 41 through conduit means 43 (sample position as opposed to drain position). Control valve 45, which is operably located at the junction of conduit means 35, 46 and 47 is set to either provide the water flowing through conduit means 35 to the filter 51 or to the filter 52. Depending upon the setting of the control valve 45, the control valve 53, which is operably located at the junction of conduit means 41, 55 and 56 will be set to receive water from either filter 51 or filter 52.
A single filter could be utilized if desired. However, a dual filter design is preferred since this allows the water flow to be shifted while a filter is being replaced. At least about 98% of the sedimentary constituents in the water flowing from the processes will have been removed after passage through the filters 51 or 52.
Water from process 2 is treated in the same manner as water from process 1 to remove sediment. Water is removed from process 2 through conduit means 61, in which control valve 62 is operably located, and is provided to the sample pot 64. The overflow 66, which is covered by the hinged top 65, catches any water overflowing from the sample pot 64 and such overflow is provided through the combination of conduit means 68, 69 and 70 to a drain.
After the sedimentary constituents have settled out, water is removed through the screened, conical particle filter 71 and is provided through the control valve 73, which is operably located at the junction of conduit means 74, 75 and 76, to the suction inlet of the pump 27 in the same manner as previously described for water withdrawn from the sample pot 14.
The valve selector 81 is utilized to control the plurality of control valves illustrated in FIG. 1. The manner in which the control valves are manipulated and the sequence of such manipulation will be described more fully hereinafter.
In operation, control valves 12 and 62, as well as control valve 83, which is operably located in conduit means 84 and control valve 85 which is operably located in conduit means 86 will initially be in a closed position. Control valves 21, 73, 32 and 38 will be in a drain position. Assuming that filter 51 is on line, control valves 45 and 53 will be in the filter 51 position.
When it is desired to sample water from both process 1 and process 2, both control valves 12 and 62 can be opened at the same time if desired or opened at different times. Water will enter the sample pot 14 and the sample pot 64 until a suitable sample has been obtained at which time control valves 12 and 62 will be closed. After a suitable settling time has passed, control valves 21, 32 and 38 will be switched to the sample position and water will be pumped from the sample pot 14 to the analyzer 31. After a sufficient sample has been provided to the analyzer 31, control valve 21 is switched back to the drain position and control valve 83 is opened. The contents of the sample pot 14 are drained through the combination of conduit means 84, 18 and 19 which prevents accumulation of sediment between sample cycles. The ability to drain the sample pot 14 also facilitates flushing of the sample pot 14 during cleaning and prevents mixing of different water samples.
While the sample pot 14 is being drained, control valve 73 can be switched to the sample position and water can be pumped from the sample pot 64 to the analyzer 31. Again, after a sufficient sample of water has been provided to the analyzer 31, control valve 73 is switched back to the drain position and control valve 85 is opened to drain the sample pot 64 through the combination of conduit means 86, 69 and 70.
Using the above described procedure, water from process 1 and process 2 can be alternately provided to the analyzer 31. It is also noted that water from additional processes could be supplied to the analyzer 31 in a sequential manner using the above-described procedure.
Any suitable filters can be utilized as filters 51 and 52. Preferred filters are cartridge filters manufactured by AMF Cuno or Balstron.
Any suitable analyzer may be utilized to analyze the water. For the hardness analysis, an IONICS Model 3212 Analyzer was used.
The valve selector 81 may be a 5TI programmable control system, Texas Instruments, Inc.
While the invention has been described in terms of the presently preferred embodiment, reasonable variations and modifications are possible by those skilled in the art and such variations and modifications are within the scope of the described invention and the appended claims.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US3369405 *||Nov 3, 1964||Feb 20, 1968||Phillips Petroleum Co||Sampling system|
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|Citing Patent||Filing date||Publication date||Applicant||Title|
|US5888026 *||Jan 24, 1997||Mar 30, 1999||Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of Natural Resources||Backfill paste production facility and method and apparatus for producing high density slurry and paste backfills|
|US6077423 *||Sep 21, 1998||Jun 20, 2000||Swaf, Inc.||Combination above grade automatic stormwater separation filtration system and method of separation and filtration|
|US6168352||Dec 31, 1998||Jan 2, 2001||Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of Natural Resources||Apparatus for producing high density slurry and paste backfills|
|US6171507 *||Apr 3, 2000||Jan 9, 2001||Swaf, Inc.||Combination above grade automatic method of stormwater separation and filtration|
|US6418799||Jul 20, 1999||Jul 16, 2002||Csi Technology, Inc.||Sampling apparatus|
|EP0245715A2 *||Apr 30, 1987||Nov 19, 1987||Sms Schloemann-Siemag Aktiengesellschaft||Apparatus for the treatment of liquids containing impurities, residues and/or ageing products|
|EP0245715A3 *||Apr 30, 1987||Sep 21, 1988||Sms Schloemann-Siemag Aktiengesellschaft||Apparatus for the treatment of liquids containing impurities, residues and/or ageing products|
|U.S. Classification||210/804, 210/138, 436/177, 210/525, 422/613|
|Cooperative Classification||B01D36/04, Y10T436/25375|
|Jan 20, 1983||AS||Assignment|
Owner name: PHILLIPS PETROLEUM COMPANY A CORP. OF DE
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:MATTHEWS, WILLIAM E.;REEL/FRAME:004079/0491
Effective date: 19830103
Owner name: PHILLIPS PETROLEUM COMPANY A CORP. OF, DELAWARE
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MATTHEWS, WILLIAM E.;REEL/FRAME:004079/0491
Effective date: 19830103
|Apr 21, 1988||FPAY||Fee payment|
Year of fee payment: 4
|Oct 15, 1992||REMI||Maintenance fee reminder mailed|
|Mar 14, 1993||LAPS||Lapse for failure to pay maintenance fees|
|May 25, 1993||FP||Expired due to failure to pay maintenance fee|
Effective date: 19930314